This page explains how to name and log four denim-specific quality faults correctly, for anyone who inspects finished denim garments: a quality checker, a merchandiser reviewing an inspection report, or a new entrant learning the trade. This lesson teaches a decision skill: once a fault is found, the inspector must name it correctly, judge its severity, and decide the action, because the wrong name sends the fix to the wrong company.
A denim garment can carry faults that a plain-dyed knit T-shirt never shows, because indigo dye sits only on the surface of the yarn and the twill weave carries a bias through the fabric. An inspector who has only checked knitwear before can meet these faults for the first time on a denim line and not know what to call them.
Without a named fault type, an inspection report only says something looks wrong, not what is wrong or who should fix it. A jean logged as having a "colour problem" gives Delta Garments' quality team no way to tell Suez Denim's dye lots apart from Cairo Wash Works' wash process, so the batch waits while the wrong company is asked to explain a fault it did not cause.
You need: T06-C01-L02 (denim washes and finishes), and it helps to know T01-C05-L02's dye-lot concept and T02-C04-L05's named-fault principle, though this lesson restates what it reuses from both.
By the end of this lesson you can:
Not covered here: what makes denim different from other woven products (lesson T06-C01-L01); denim washes and finishes (lesson T06-C01-L02); costing a denim order (lesson T06-C01-L04); building a complete denim order file (lesson T06-C01-L05).
| Term | Meaning |
|---|---|
| Dye lot | One batch of fabric dyed together in the same vat, which can differ slightly in shade from another batch of the same colour. |
| Shade variation | A difference in colour between separate dye lots or rolls, even when both were dyed to the same colour standard. |
| Shade grading | Sorting washed or dyed denim panels or garments into shade groups so only pieces within the same, or a compatible, shade group are combined in one garment or one shipment carton. |
| Crocking | Indigo dye rubbing off a denim garment's surface onto another surface, such as skin, a lining or another garment, through friction. |
| Torque (twisted leg) | A denim-specific fault where the outseam and inseam twist out of true alignment after washing, caused by the fabric's twill-weave bias. |
| Whisker (scraping) effect | A denim wash-finishing effect creating fade lines across the front thigh area that mimic natural wear creases. |
Denim carries four fault types that do not exist on Order A's plain-dyed knit T-shirt, because they come specifically from indigo's surface-only dye behaviour and the fabric's twill-weave bias. Shade variation is a visible colour break where panels cut from different dye lots meet. Crocking is indigo dye rubbing off onto another surface through friction. Torque, also called twisted leg, is the outseam or inseam twisting out of true alignment after washing. Whisker misalignment is an intended fade-line effect landing inconsistently between paired garment panels. Each logged fault gets a severity of Minor, Major or Critical, and an action of Accept, Rework or Reject.
| What can differ | The shapes you meet | Why it matters |
|---|---|---|
| Shade variation between panels | A visible colour break where two panels from different dye lots meet, typically Major or Critical depending on visibility | Traces back to Suez Denim's dye lots, not to a sewing or washing step |
| Crocking | Dye transfer onto pocket linings, other garments, or skin, typically Minor if it resolves with an extra rinse, Major if the garment's own shade is affected | Traces back to Cairo Wash Works' wash process, not to Suez Denim's fabric |
| Torque, also called twisted leg | Seam alignment visibly off after washing, a fabric-bias problem rather than a sewing error, typically Major since it affects fit and appearance | Comes from the twill weave's own bias, so it is not fixed by re-sewing the seam |
| Whisker misalignment | A deliberate fade effect landing unevenly between the left and right leg, typically Minor to Major depending on how visible the mismatch is | Affects appearance only, but still needs its own specific label, not a general "finish" note |
| Export order such as Order B's own fixed batch | The same four fault types and the same naming discipline apply whether the batch ships to Northline Apparel under Order B or to any other export or domestic buyer | Shows the naming rule holds regardless of who the finished jeans ship to |
Delta Garments' quality team inspects a batch of Order B's jeans after Cairo Wash Works returns them from washing, checking each garment against the four denim-specific fault types before the batch is cleared for Northline Apparel's shipment. Order B is a five-pocket jeans order for 3,000 pieces, made from Suez Denim's 12 oz denim and given its own fixed two washes at Cairo Wash Works. The quality team's task is not to decide whether a garment "looks fine"; it is to check each garment against the four named fault types, one at a time, and log any it finds with a specific name, a location, a severity and an action.
This lesson needs no new order quantity. It reuses Order B's own fixed 3,000-piece denim order, the jeans order, as the population an inspection sample is drawn from, and demonstrates recording individual fault instances in the Quality Fault Log's exampleRow, exactly as shown in the workbook.
| Fault type | Location | Severity | Action |
|---|---|---|---|
| Shade variation | Left leg panel vs right leg panel | Major | Rework |
| Crocking | Right pocket bag lining | Minor | Accept |
| Torque (twisted leg) | Left outseam and inseam | Major | Rework |
A common mistake is logging a denim fault under a vague label such as "colour problem" instead of its specific fault type. Shade variation and crocking are different faults with different causes and different fixes: shade variation traces back to Suez Denim's dye lots, while crocking traces back to Cairo Wash Works' wash process. A vague label cannot distinguish between the two, so it sends the corrective conversation to whichever company happens to be asked first, not to the company that actually caused the fault, and the batch waits longer than it should. The same discipline applies to torque and whisker misalignment: naming each fault by its own type, rather than folding it into a general "fit problem" or "finish problem" note, is what lets Delta Garments' quality team point the fix at the right stage of Order B's own chain, from Suez Denim's weaving through Cairo Wash Works' washing.
A pair of jeans can go wrong in ways a plain T-shirt cannot, because the blue dye only sits on the surface of the yarn and the weave of the fabric has a natural twist in it. One panel of the jeans can look a slightly different blue from another panel. The blue dye can rub off onto the inside pocket or onto skin. The two legs can end up twisted after washing, not lined up straight. A fade pattern meant to look the same on both legs can end up looking different. Each of these is its own separate problem with its own separate cause, so it needs its own separate name when it is written down. Writing "colour problem" instead of naming exactly what went wrong sends the question to the wrong company and wastes time everyone would rather spend fixing the real cause.
Suez Denim, the mill, checks its own dye-lot records before releasing fabric for cutting into Order B's jeans panels, since a shade mismatch traced back to the mill's own lots is exactly the fault type this lesson names as shade variation. The facts in front of Suez Denim's own quality function:
The document Suez Denim's own quality function reads, the shipping ticket as drafted:
Is "colour check pending" specific enough before these rolls ship? Decide before you open the answer.
No. "Colour check pending" does not name the actual risk: releasing two dye lots that read a visibly different shade risks shade variation once Delta Garments cuts panels from both rolls into the same jeans.
Two facts, together, decide this. First, the difference sits between two separate dye lots, not within a single wash cycle's dye transfer, which is exactly how shade variation arises rather than crocking. Second, the mismatch is visible before cutting even starts, which is precisely why Suez Denim's own shade check exists at the mill stage, ahead of Delta Garments' own inspection after washing.
Suez Denim's quality function should shade-grade the two rolls and hold back any combination that would place mismatched panels in the same garment, logging the fault specifically as shade variation, so the mill's own dye-lot records, not Delta Garments' cutting room, carry the correction.
This lesson's cost is framed qualitatively, since no separate cost figure for a mislabelled denim fault is fixed elsewhere in this academy. A vaguely logged fault sends the wrong company chasing the wrong fix, delaying the batch's release toward Northline Apparel's shipment date.
Order B's own denim schedule already runs 22 weeks in total, and washing is only 3 of those weeks. If "colour fault" is first sent to Suez Denim to check its dye lots, and only later, after no cause is found there, sent on to Cairo Wash Works to check its wash process, the batch loses days it does not have inside an already tight washing and shipping schedule. Naming the fault specifically, as crocking, the first time it is logged, sends the question straight to Cairo Wash Works and avoids that avoidable delay.
Copy this table into the Quality Fault Log sheet. Fill each row with the specific fault type, not a general description.
| Fault type | Location | Severity | Action | Notes |
|---|---|---|---|---|
| Shade variation | Trace to Suez Denim's dye lots | |||
| Crocking | Trace to Cairo Wash Works' wash process | |||
| Torque (twisted leg) | Trace to the fabric's own twill-weave bias | |||
| Whisker misalignment | Trace to the wash-finishing step |
Download the full working sheet from the link on this course's page.
Download the Denim order file, Quality Fault Log sheet (Excel)
1. What causes torque (twisted leg) in a denim garment, and why is it not a sewing error?
2. Why does crocking typically point to a different company than shade variation?
3. An inspector finds five jeans, from a 5,000-piece export order at a different factory, with fade lines that look different between the left and right leg. What fault type should be logged?
| EN | AR | FR | TR | Meaning |
|---|---|---|---|---|
| Dye lot | دفعة الصباغة | Lot de teinture | Boya partisi | One batch of fabric dyed together in the same vat, which can differ slightly in shade or hand-feel from another batch of the same colour. |
| Shade variation | تفاوت درجة اللون | Variation de nuance | Ton farkı | A difference in colour between separate dye lots or rolls, even when both were dyed to the same colour standard. |
| Shade grading | تدريج درجة اللون | Classement par nuance | Ton derecelendirme | Sorting washed or dyed denim panels or garments into shade groups so that only pieces within the same, or a compatible, shade group are combined in one garment or one shipment carton. |
| Crocking | تفريغ اللون بالاحتكاك (كروكينغ) | Dégorgement (solidité au frottement) | Kroking (sürtünme ile boya aktarımı) | Indigo dye rubbing off a denim garment's surface onto another surface (skin, lining, another garment) through friction, a common denim-specific fault because indigo only colours the yarn's surface. |
| Torque (twisted leg) | الالتواء (التواء ماسورة البنطلون) | Torsion (jambe vrillée) | Burulma (bacak dönmesi) | A denim-specific fault where the outseam and inseam twist out of true alignment after washing, caused by the fabric's twill-weave bias. |
| Whisker (scraping) effect | تأثير الشوارب (الخدش) | Effet moustaches (grattage) | Bıyık (zımparalama) efekti | A denim wash-finishing effect creating fade lines across the front thigh area that mimic natural wear creases; misalignment of this effect between garment panels is a denim-specific quality fault. |
You now know how to name and log the four denim-specific quality faults correctly, and why a vague label sends the fix to the wrong company. The next lesson costs Order B's own denim order, from Suez Denim's fabric price to Cairo Wash Works' finished wash. Back to the course map